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Catalyst for catalyzing esterification reaction and synthesis method thereof

A technology for catalyzing esterification and synthesis methods, applied in the field of catalysts for catalyzing esterification reactions and their synthesis, can solve the problems of catalyst loss of activity, etc., and achieve the effects of reduced dosage, environmental friendliness, and good dispersibility

Inactive Publication Date: 2020-11-17
BORICA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when titanium-based catalysts are used together with additives such as thermal stabilizers or matting agents, the catalyst may react with the additives to cause the catalyst to lose its activity

Method used

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  • Catalyst for catalyzing esterification reaction and synthesis method thereof
  • Catalyst for catalyzing esterification reaction and synthesis method thereof

Examples

Experimental program
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preparation example Construction

[0027] The disclosure provides a method for synthesizing a catalyst for catalyzing an esterification reaction, comprising the following operations: (1) mixed metal chlorides, metal nitrates, metal carbonates, metal carboxylates, metal One of the sulfate and the oxide of silicon, and the polar solvent form a first mixed solution, wherein the polar solvent includes water, glycol, polyol or a combination thereof. (2) Adding an alkaline substance to the first mixed liquid to form a dispersion liquid. The dispersion contains multiple carriers. For example, the support can be a metal hydroxide, a metal oxide, a metal chloride, a metal nitride, a metal sulfide, a silicon oxide, or a combination thereof. (3) Adding metal alkoxides to the dispersion liquid to form a second mixed liquid, wherein the metal alkoxides include titanate, aluminate, zirconate or a combination thereof. (4) heating the second mixed liquid to form a catalyst. The catalyst includes a polar solvent, multiple su...

experiment example 1

[0032] The following embodiments are used to describe specific aspects of the present invention in detail, and enable those skilled in the art to implement the present invention. However, the following examples should not be used to limit the present invention. Experimental example one: the catalyst of synthesis embodiment 1~7

[0033] The experimental procedure for synthesizing the catalyst of Example 1 is briefly described as follows. To a round bottom flask equipped with a stirrer, 25 g of calcium chloride (225 mmol Ca) and 30 g (1.6 mol) of water were added. Next, 330 g of ethylene glycol (ethyleneglycol) was added to form a first mixed liquid. Then, add 90g of 10wt% sodium hydroxide aqueous solution to form a dispersion liquid containing calcium hydroxide (Ca(OH) 2 ) carrier, the pH of the dispersion is between 9 and 10. Finally, 64 g (225 mmol Ti) of titanium isopropoxide (alkoxide of metal) as a reactant was added to the dispersion to form a second mixed liquid in w...

experiment example 2

[0037] Experimental Example 2: Performance testing of the catalysts of Examples 1-7 and the antimony acetate of Comparative Example 1

[0038] Performance tests were performed on the catalysts in Examples 1-7 above using a thermogravimetric analyzer / differential thermal scanning analyzer (purchased from Mettler Toledo, TGA / DSC3+STAR). Using bis(2-hydroxyethyl)terephthalate (BHET, commercial grade, purity 85%) as reactant, the reactivity of the catalyst to polycondensation reaction was measured. The experimental steps are as follows. The BHET was melted at a temperature of 107˜110° C., and a catalyst with a metal content of 10 ppm, a heat stabilizer with a phosphorus content of 10 ppm, and 1% of titanium dioxide were added to form a reaction mixture. The reaction mixture was stirred until uniformly mixed. Next, the reaction mixture is cooled, and the cooled reaction mixture is ground into a powder. 10 mg of powder was placed in a 40 μL standard aluminum crucible with a lid, ...

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Abstract

The invention relates to a catalyst for catalyzing esterification reaction and a synthesis method thereof. The catalyst comprises a polar solvent, a plurality of carriers and a plurality of metal coordination polymers. These carriers are dispersed in a polar solvent and include a hydroxide of a metal, an oxide of a metal, a chloride of a metal, a nitride of a metal, a sulfide of a metal, an oxideof silicon, or a combination thereof. These metal coordination polymers include titanate hydrolysates, aluminate hydrolysates, zirconate hydrolysates, or combinations thereof. Some metal coordinationpolymers are attached to the carriers to form a plurality of microparticles having an average particle size in the range of 10 nm to 1 [mu]m. Other metal coordination polymers are dispersed in a polarsolvent. The catalyst is good in dispersity and has a good catalytic effect. Moreover, the polyester obtained by catalyzing the esterification reaction by utilizing the catalyst has good brightness and chroma, and the yellowing problem and the yarn breaking problem are not easy to occur.

Description

technical field [0001] The invention relates to a catalyst for catalyzing esterification and a synthesis method thereof. Background technique [0002] Now there are many kinds of catalysts that can be widely used in catalyzing the esterification reaction. Traditionally, antimony-based catalysts are often added to the polycondensation reaction for synthesizing polyethylene terephthalate (PET). However, when the dosage of antimony is high, antimony-containing particles can accumulate in the spout, so regular cleaning is required to prevent broken wires from occurring. Moreover, antimony is a potentially toxic metal, which limits the applicability of antimony-based catalysts. In order to solve the above problems, a titanium-based catalyst is often used to catalyze the esterification reaction, which can solve the problem of broken wires caused by particles accumulating on the nozzle. However, due to the high reactivity of titanium-based catalysts, it is easy to cause yellowin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/85C08G63/83C08G63/84C08G63/87
CPCC08G63/85C08G63/83C08G63/84C08G63/87
Inventor 谢嘉玮施淳瀚啜福铭
Owner BORICA CO LTD
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